Telegraph system



July 14, 1925.

L. M. POTTS TELEGRAPH SYSTEM Filed Jar}. 5, 1922 Patented July 14, 192 5. N

LOUIS M; POTTS, 0F HIGHWOOD, NEXV JERSEY, ASSIG-NOR TU COMPANY. INCORPORATED,

FLIEGEEBH? or new roux, ,N. A CORPORATION or new "res TELEGRAPH SYSTEM.

Application filed January 5, 1922. Serial Nit/527964.

To all whom it may concern.

Be it known that I, LOUIS Ml Porrs, a citizen' of the United States, residing at Highwood, in tlfe county of Bergen, State of New Jersey, have invented-certain new and useful Improvements in 'lelegraphSystems, of which the following is a full, clear, concise, and exact description.

This invention relates to telegraph systems and particularly to current impulse repeaters for use in such systems.

An object of the invention is the provision of an efilcient, reliable, and inexpensive repeating means whereby signaling impulses may berepeated from one line section to another free from bias and distortion.

The invention is an improvement of the system disclosed and claimed in P. M. Raineys Patent No. 1,530,514, "ranted Mar. 24, 1925. i

The invention provides a single vibrating member having a natural period of motion in combination with a plurality of polarizedstoring' relays for repeating, free from bias and distortion, signaling current impulses transmitted from two distant stations.-

The drawing shows one embodiment of the invention. i

Line conductors 4 and 5 extend from distant stations which are'equipped for sending and receiving messages Connected with the conductor" are polarized relays 6 and 7 It I "ay 6 controls the operation of a neutral "relay through the discharge of condensers 30-. 31. Relay 8, in turn,-controls mechanism for governing a tuning fork 9 or other vibrating member which has a natural period of motion corresponding tothe frequency of the impulses transmitted over the line conductors. -'l.his mechanism comprises a neutral relay 19, a relay 1Q, and'a magnet 11 which is energized by a circuit extending from the positive terminal of battery through a resistance 23, the Winding of magnet 11, an. extension of one prongoflthe fork, and a contact 29, to the negativcterminal' of battery. When the armature of relay 10 is in the position shown, the resistance 23 is short circuited through this armature and its contact.

The tuning fork in vibrating forms a contact alternately with the positive and negtu tive contacts of a battery 22 and thus ener-- gizes polarized relays 12, 13, and 14. Relay which operate in conjunction wibrating in unison with the ii.

simultaneously.

Whcn the armature of relay is in series.

13 controls relay 19, which in turn controls through its contacts the energizing circuit of relay l0. Relay 12 controls a relay 15 Whose. armature connects the line conductor 5,

lending to the ratio arms in bridge ollwliich till the windings of a recewing relay 3 corresponding to relay 7 are connected, with the batteries connected with polarized storing relays 17 and 18 alternately. ltelay lit-also controls a relay 16 whose armature-connects the relay 7 with storing relays l8 and l? alternately. Controlled by relay M are re. lays 25, 26, Q7, and Ed -which cor-res v relays l5, l6, 1? and 'h, resp c conductor 5 and reliiy E lor renews naling impulses from the line condo. the apex of the ratio arms in urid; relay 7 is connected.

Let it be assumed that the tun' impulses sent ore the line conductor that an impulse of negative polarity i s been applied to the line conductor 4., put mg thearmatures of all the relays controlled there so by in the position shown intlie drnndi Let it'be further assumed that nn iingonls or a positi re polarity transmit l v e no conductor 4, and that this inipniserev position of the armatures of relays 6 current flows i'i'iomentarily through r which momentarily attracts its l 8 fsendin an 1m nlse throu 'h either the n ner orthe lower coil of relay l0, di'ipending on the position of the armature'of relay 19.. H the lower coil of relay 10 is energized, the armature remains in the position shown, the resistance 23 is short circuited through the armature and contact of relay 1i), and, the fi lower prong of the tuning fork being in contact with. contact 29, the magnet 1 1 is energi zed; If the upper coil of relay 10 is ener gized, the armature is reversed, this circuit broken and the current flowing through resistance Elli-when the tuning fork establishes a contact with the contact 29 does not cnergize the magnet. The upper coilol ale 1 it) is only energized when the relay A its armature, and this is controlleo ny the we tuning fork 9, as explained below.

As the prongs of the tuning fort: rihrate outwardly its upper prong-establishes a to tact with the upper contact of a battery At the same time its lower prong establishes honing n hrolien. o 29, the magnelwill lie lie-en l'secl mini, the iiorlz will then tend Ell on "D n lo norete outwereily again. A the upper prong of the iorlx nislies connections eliersolely with positive and negative contacts of better 22 it causes current to flow through line windings of .rele l2, lilo-nil 1% for re versing line position their HIZXHEtUYQS. CO1)- nected with the coolness of relay 1? and a source of battery ere condensers 20 end 21 which upon discharging sen iinplnses oi momenioi'y (lnreiion through relay 19. ifshe tuning fork is vibrating in perfect co orelinsiion with the frequency of the incoming signals, relay 1% and the upper coil oil relay will be energized at the exact instant that an impulse from line conductor 4' received so that no circuit, will he established lhrough the ni'maiure and coniece'of relsy l0, and the magnet will onl Y be normelly energized. If the vibrations oi the tuning ioriz are not in coortlination with the incoming signals, however, she armature of" the relay i9 will he in the position shown when no impulse is received. from line conelector i, the resistance 23 will be short circuitcd, and. the magnet will be) strongly energized when a contact is established at 29, and will funciion to coordinate the vibrations of the tuning fork with the signels received over the line conductor 4,

Assume, as before, that the device is in oneretion, that the ermatures of the relays 1 ol the system are in the position shown, and "eliei, it IS desired to repeat from the line conelector e a signaling impulse of a positive polarity which will he free froni'loias and distortion to the line conductor The signaling impulse of e positive polarity impressed at the end of the line 4 being re ceive& at the repeating station passes through the windings of the polarized relays 6 aml 7 thereby causing the reversal w the position oftheir ermatures. Relay 8, in reversing the position of its armature, breaks the circuit through relay 8 and condenser 31 and allows this condenser to be charged. ll estalr lishese circuit through relay 8 and condenser 30, and this condenser, in discharging, allows an impulse to flow momentarily through relay 8. As shown above, however, this reley only afi'ecls the vibrations of the tuning fork when it is not vibrating in unison with the signals being transmitted over the line 4. Relay 7, in reversing the position of-its armature, applies positive battery 'to the winding o,f polarizc l relay 17, the energizing circuit of which extends from the positive terminal of battery, upper contact and. armature of relay 7 armature and contact leeleeoi oi relay 16, and the windings of relay 1'2", to the negative terminal of battery, Belay i7 reverses the position of its armature for connecting positive battery with the upper contact of relay and, since this relay is controlled, as previously described, irom contacts on the polarized relay 1%, which in turn is controlled, by the contacts of lhe tuning fork, this relay will films be operated in unison Will the transmitted signals. relay 15 will also be caused to reverse the positionoi its armature for connecting to the open of the ILilO arms, in bridge of which the receiving relay 3 is connected, the positive terminal of the battery combrolloil by the armature oi relay l7. An. impulse of a positive polarity will thus be transmitted over the line conductor 5 lo ihe distant station connected thereto.

(living lo the effect of line leg i6; is necessery to control the energization of relays l5 and 18 so that these relays will be energized at the time signals ore receiveil at the repeati'ng station or slio-rcly tliereo ller, by the use of a variable inductance 24-. This inductance may be Varied over a wide range for controlling the energizetion of relays l5 and 16 through'coniecis under the control of relay 12.

Similarly, signaling impulses f'erensmictecl over the line conductor 5 may be regenerated and repeated to the line conductor 4 free from bias and distortion simultaneously with the transmission of signaling impulses from the line conductor '4: to the line conductor 5, as previously descrihecl.

The

inasmuch. relays l9; and 1% operatesimultaneously, the relays connector therewill; must operate simultaneously with each other under ultimate control of the signals over the line conductor 4. The signols repeeled over line conductors 4e and 5 are thereby. coordinated.

While e specific way of arranging telegraph apparatus according to this invention has been shown, it is to be understood that the invention is not limiecl to this perticuler arrangement.

What is claimed is:

1. Repeating apparatus connected intermecliate two adjacent line sections extending to remotely situated stations coi'nprising a plurality of polarized relays controlled by impulses received from one of the linesecr tions for storing such impulses which are to be subsequently retransmitted over the other line section, ands member heving a, natural period of motion cooperating with said relays for-efiecting the retransmission of the impulses stored in saiol relnys.

2. In e ielegraph system, a line equipped for duplex operation; a repeater associated with said line comprising a plurslit of reeating the storage of said impulses which i eeeeei from one of said-line sections for storing the impulses which are later to beretransmitted to the other line section, a vibrating member having e natural period of motion coopereting with said.- releys for effecting the re transmission of said impulses free from bias and distortion, and ineens for coordinating the vibration of said member with the frequencies at which impulses are being trans mitteil over said line" 4. In a telegraph system, a line coiidu'ictorequipped for duplex service, arepeetei' conjnectecl intermediate the ends of said line conductor comprising a single vibrating member having a natural" period of motion equal to the frequency at which signals ere being transmitted over the line, a. source of signaling current, e plurality of polarized storing relays controlled by said vibrating member for regeneretingend rep-eating mes-- sage impulses from one iine section to meother free from bias and distortion, and

means whereby yibretions of seid vibrating men'iber may be coordinate with. the frevquency which signals are being trans mitted over said. line.

5 lie. e telegraph system. at line conductor equipped for duplex; service, e repeater eoniiected intermediate the ends of said line comprising a meiiibsiarheving 22 natural period of motion equal to the frequency at which signals are being transmitted over said line, means controlled by see member for storing and; repeating free from bias 45 emll distention from one line section to another the signals transmitted over SZIiLl line, and means for maintaining the vibrations of said inen'iber in ainiso yvitli the signals transmitted over said line.

6. In it telegi'g ph system, a .line conductor equipped for cluplex service, :1 repeater com prising a vibretii'lg' member having e net urel period of! motion,- two pairs of polar: reed. relays connected with each line section for-storing and repeating free from bias and distortion the signals transmitted over'tlie line, said peirs of relays being controlled by said vibrating member, and means for coordinating the vibrations of said vibreta izig member with the frequency at which sigmils are being transmitted over the line.

In Witness whereof, I hereunto subscribe my name this'lrgi day of January A. 1).,

' LOUIS M. IPGTTS, 

